In a small bowl, whisk together the creamy peanut butter, tamari, lime juice, grated fresh ginger, and sriracha until the sauce is smooth and combined.
Heat the avocado oil in a large skillet over medium-high heat until shimmering.
Add the ground turkey to the skillet, using a spatula to break it into small crumbles, and cook until browned and no longer pink.
Stir in the diced red bell pepper and chopped water chestnuts, sautéing for 3 to 4 minutes until the peppers are tender but still vibrant.
Pour half of the prepared peanut sauce into the skillet and toss thoroughly with the turkey and vegetable mixture to coat.
Prepare the butter lettuce leaves by washing and patting them dry, then arrange them on a serving plate.
Spoon a generous portion of the turkey mixture into the center of each lettuce leaf.
Drizzle the remaining peanut sauce over the wraps and garnish with sliced green onions and sesame seeds before serving.